Medium-chain Triglycerides Inhibit Long-chain Triglyceride-induced GIP Secretion Through GPR120-dependent Inhibition of CCK
Overview
Authors
Affiliations
Long-chain triglycerides (LCTs) intake strongly stimulates GIP secretion from enteroendocrine K cells and induces obesity and insulin resistance partly due to GIP hypersecretion. In this study, we found that medium-chain triglycerides (MCTs) inhibit GIP secretion after single LCT ingestion and clarified the mechanism underlying MCT-induced inhibition of GIP secretion. MCTs reduced the CCK effect after single LCT ingestion in wild-type (WT) mice, and a CCK agonist completely reversed MCT-induced inhibition of GIP secretion. studies showed that medium-chain fatty acids (MCFAs) inhibit long-chain fatty acid (LCFA)-stimulated CCK secretion and increase in intracellular Ca concentrations through inhibition of GPR120 signaling. Long-term administration of MCTs reduced obesity and insulin resistance in high-LCT diet-fed WT mice, but not in high-LCT diet-fed -knockout mice. Thus, MCT-induced inhibition of GIP hypersecretion reduces obesity and insulin resistance under high-LCT diet feeding condition.
The emerging role of gut hormones.
Cho H, Lim J Mol Cells. 2024; 47(11):100126.
PMID: 39426686 PMC: 11577206. DOI: 10.1016/j.mocell.2024.100126.
Zenimaru Y, Harada N J Diabetes Investig. 2024; 15(12):1725-1726.
PMID: 39344684 PMC: 11615690. DOI: 10.1111/jdi.14305.
Ezaki O Nutrients. 2024; 16(16).
PMID: 39203743 PMC: 11357358. DOI: 10.3390/nu16162606.
Lafferty R, Flatt P, Gault V, Irwin N J Endocrinol. 2024; 262(2).
PMID: 38861364 PMC: 11301427. DOI: 10.1530/JOE-23-0339.
Cellular mechanisms of incretin hormone secretion.
Santos-Hernandez M, Reimann F, Gribble F J Mol Endocrinol. 2024; 72(4).
PMID: 38240302 PMC: 10959011. DOI: 10.1530/JME-23-0112.